TY - JOUR T1 - The Description of a New Quadrant for Taking Altitudes without an Horizon, Either at Sea or Land. Invented by Mr. John Elton JF - Philosophical Transactions (1683-1775) VL - 37 SP - 273 EP - 279 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1731.0048 M3 - doi:10.1098/rstl.1731.0048 AU - Elton, J. ER -